Elevator mechanism.



J. BAUM.

BLEVATOR MBGHANISM.

APPLIOATION FILED JAN.11, 1903.

PATENTED JULY 28, 1908.

3 SHEETS-SHEET 2.

Wi n esses.-

mentor m uw ttarn No. 894,418. PATBNTED JULY 28, 1908.

8 J. BAUM.

ELEVATOR` MEGHANISM.

APPLICATION FILED 1.511,11, 190e.

3 SHEETS-SHEET 3.

396 4` I -Atrtorn UNITED STATES PATENT OFFICE.

JACOB BAUM, OF CINCINNATI, OIHIO.

ELE VATOR ME CHANISM.

No. seams.

To all whom it may concern:

Be it known that l. JACOB BAUM, a citizen of the United States, residingat Cincinnati, in the county of Hamilton and State of Ohio, haveinvented certain new and useful Improvements in Elevator Mechanisms, ofwhich the following is a specification.

My invention relates to hoisting appan ratus, and. the object is toprovide an elevator' car with supporting mechanism that is simple andefl'ective and adapted to insure the car against falling in case ofbreakage of the cable.

My invention consists in the elevator mechanisms herein set forth andclaimed.

In the drawings: Figure 1 is a plan view of part of an elevator carembodying my invention, this view serving, as well, to illustrate thearrangement of the overhead supporting mechanism for the cables. Fig. 2is a side elevation of part of the upper frame work of the car and thevertical guides, this view servingto illustrate the application of thespringl to actuate the supporting head downwardly, as will hereinafterbe more fully described. Fig. 3 is a detail view of part of the beamillustrating the application of one of the spring holding plates, and.Fig. 4 is a detail perspective view of one of the spring holding plates.Fig. 5 is a side elevation of the supporting head, eccentric andconnecting mech anism, parts being broken away for lack of space. Fig. 6is a detail perspective view of the combined guide and bearing block.

' Fig. 7 is a detail perspective view of the crank for the inner end ofthe eccentricshaft. Fig. S is a cross section on a line corresponding tox-.r of Fig. 5. Fig. 9 is a cross section on a line correspondingI toy-Jy of Fig. 5, eX- cepting that the upper part of the supporting headand parts of the yoke attached thereto are shown in the section on aline extending vertically through the centers of the 4sheave shaft andconnecting bolt. Fig. 1() is a detail perspective view of the supportinghead with the pin block attachedthereto. Fig. 1l is a detail perspectiveview of one of the slotted rings, and F ig. 12 is a detail perspectiveview of one of the bearing blocks for the mechanism for operativelyconnecting the supporting head with the eccentric. l

My invention is illustrated as applied to an ordinary freight elevatorcar, of which part of the floor is shown at 1. in Fig. 1 of thedrawings, this car being provided with upright posts 2, the upper partsof which are connect- Specification of Letters Patent.

Application filed January 11, 1908.

Patented July 28, 1908. Serial No. 410,327.

ed by a transverse beam 3, as is usual in the construction of suchelevator cars. The stringer 4 is secured to the wall 5 of the elevatorshaft in a vertical position by suitable means, such as the bolts 6. Arail 7 is secured to this stringer in the middle thereof, and upon thisrail 7 a guide rail 8 is secured, both the rail 7 and the guide rail 8,as well as the stringer 4, running the full length of the travel of theelevator car. The combined guide and bearing block 9 is secured on thepost 2 of the car by means of bolts 10 passing through the post fromedge to edge, and by means of bolts 11 passing through the post fromside to side at right angles to the bolts 10. ln addition to these twosets of bolts, the post 2 is provided with recesses 12 in its edges,into which take the lugs 13 of the guide and bearing block. @therrecesses 14 are provided in the edges of the post 2 adjacent to therecesses 1.2, and the ends of the braces 15, as well as the ends of thestrap 16, are suitably bent to take into these recesses 14, while theguide and bearing block 9 is provided with additional shoulders oroffsets 12"1 adapted to bear against the braces 15 and strap 16. Thisarrangement of recesses and lugs and shoulders constitute the preferredconstruction, and is adapted, in connection with the arrangement of thedouble set of bolts, to attach the combination guide and bearing blocksecurely to the post so as to efliciently resist the strain im )osedinthe operation of the eccentrics, as will hereinafter be described. Thebraces 15 are additionally secured to the post 2 and to other parts ofthe car, the details of which are not illustrated in the drawings sincethey form no part of my invention. The straps 16 are adapted toreinforce and protect the upper end of the post 2. In the middle of thecombination guide and bearing block 9, outside the post 2, is providedthe vertical' guide way 9a, adapted to receive the guide rail 8, andatthe sides of the post, the guide and bearing block 9 is provided withthe horizontal bearings 17 in which are journaled the eccentric shafts18. On the outer ends of the eccentric shafts 18 the eccentrics 19 aremounted and rigidly secured by means of the keys 20. On the inner endsof the eccentric shafts are the cranks 21 rigidly secured to the shaftsby means of set screws 22.

As illustrated in Fig. 2, a set of the above described mechanisms isprovided on each one of the posts 2 of the elevator car, and a CII railand a guide rail 7 andv 8, respectively, are provided at each side ofthe elevator shaft.

It should be understood. that while l have herein shown and describedthe guide rail 8 mounted on the rail 7, the guide way 9EL of the guideblock 9 being adapted to cooperate with the guide rail 8, and the railbeing adapted to be engaged by the eccentrics in their operation toprevent the falling of the car, the rail 7 might be continued past theinner sides of the eccentrics 19 so as to enter the guide way of theguide block, and even thc stringer 4 might be dispensed with by boltingthe rail 7 directly to the wall of the elevator shaft, in which case therail 7 would be made to serve the purpose of the stringer, rail andguide rail herein shown and described. However, l prefer to provide theguide rail 8 in addition to the rail 7, and of smaller cross sectionthan the rail 7, since such a guide rail is of sufficient size to servefor guiding the car in its vertical movement, while it is desirable toprovide the somewhat heavier rail 7 for the engagement of the eccentrics19, since, in the operation of the eccentrics, this rail 7 would berequired to support the entire weight of the car and contents. It isalso desirable to provide the stringer 4 of greater width than the rail7 to form secure means for attaching to the wall of the elevator shaft.

Midway of the beam 3, the supporting head 23 embraces the beam 3 and ismaintained in position for sliding vertically by means of guide plates24 suitably attached to the beam 3, such as by screws 25. Thissupporting head 23 is provided with openings 26 in its upper part,through which the connecting bolt 27 may pass, for pivotally securing tothis supporting head 23 the yoke 28, which is composed of two sidemembers between which are journaled the sheaves 29 on the bolt 30. Thesesheaves 29 are adapted to receive the cables 31, the free ends of whichare secured to heads 32 suspended on the pin 33 which. is supported atthe top of the elevator shaft on beams 34. These cables 31 pass underthe sheaves 29, then pass upward over sheaves 35 ournaled in suitablebearings on the beams 34, then passing over the sheaves 36 journaled inbearings likewise mounted on the beams 34 at the side of the elevatorshaft, Vfrom which sheaves the cables 31 pass downward to suitablemechanism for raising and lowering thc elevator car, not herein shown,since it does not constitute part of my invention.

As is usual in the constructionof elevators, the beams 34 are placedacross the elevator shaft at an angle to the walls thereof, so that thecables 31 will pass downward adjacent to the walls of the elevator shaftwithout interfering with the stringer 4 and rail 7 and guide rail 8. Asa consequence of this construction, the sheaves are also placed at anangle to the walls of the elevator shaft and to the beam 3 of theelevator car. In order to compensate for the angle, l construct thesupporting head 23 with its upper part 37 at an angle to its lower part38, as is best illustrated in Fig. of the drawings. This allows thesheaves 29 to assume positions parallel to the sheaves and sheaves 36 atthe top of the elevator shaft, and avoids twisting of the cables duringtheir operation, thus lessening the wear on the cables as well thefriction in the operation of the elevator. The supporting head 23 ispreferably provided with a transverserib 37IDL above the beam. 3 and ofa sufficient distance therefrom to allow the proper vertical motion ofthe supporting head 23 with respect to the beam 3. A series of flatsprings 39 a, 39h, and 39C are interposed below the beam 3 between itand the lower transverse part 4U of the supporting head 23, thesesprings being so formed as to tend to force the supporting head 23downward with respect to the beam 3, but this tendency beingcounteracted by the tension of the cables 31 when the car is suspendedby them and the supporting head 23. Preferably, a screw 41 takes throughthe transverse part of the supporting head 23 and. through the flatsprings to hold them from lengthwise displacement, and spring holdingplates 42 are secured to the under edge of the beam 3 and embrace theparts of the flat spring 392L adjacent to its ends, thus preventing thelateral displacement of the spring. Springs 39'u and 39C are providedwith lugs 43 and 44 which prevent the lateral displacement of thesesprings by engaging with the springs 39a and 39h, respectively.

A bearing block 45 is mounted on each one of the guide plates 24 andsecurely fastened by means of screws 46 taking into the beam 3, while asimilar bearing block 47 is secured on each side of the beam 3 in asimilar manner near each of the combination guide and bearing blocks.Crank shafts 48 are journaled in the bearing blocks 45 and 47, and haveslotted cranks 49 rigidly secured on them adjacent to the bearing blocks45 by means of set screws 50, while adjacent to the cranks 21, slottedcranks 51 are rigidly secured on the crank shaft 48 by means of setscrews 52. A pin block 53 is rigidly mounted on the supporting head 23at each side, and each of these pin blocks 53 has a pin 54 rigidlysecured in it by means of a set screw 55 and extending laterallytherefrom into the x slots 56 in the slotted cranks 49. Pivot screws 57pass through the slots 58 in the slotted cranks 51 and are screwed intothe cranks 21 on the eccentric shafts 18. Thus the pin blocks 53, crankshafts 48, slotted cranks 49 and 51 and the pin 54 and pivot screw 57constitute means for operatively connecting the supporting head 23 tothe eccentrics 19 by means head 23 is held upward by the tension of thecables, against the force of the flat springs above described. However,should the cables break, the supporting head 23 would be moved downwardby its own weight as well as by the force of the flat springs. r1`hiswould rotate the slotted cranks 19 downward, and this motion beingtransmitted by the crank shafts 48, the slotted cranks 51 would also berotated downward, carrying the cranks `21 downward and rotating` theeccentric shafts 18 so that thc eccentrics 19 are drawn inward againstthe rails 7, and engaging therewith, prevent the further falling of theelevator car.

As will be noted, when the eccentrics 19 have once engaged with. therails 7, all further downward pressure will have a tendency to force theeccentrics farther inward and to cause them to grip the rails 7 moretightly. It should also be noted that the normal disengaged position ofeach eccentric is such that if released, it will move toward the rail 7by its own weight, while the motion of all of the cranks in theconnecting mechanism, as well as that of the supporting head and thesheaves thereon, will be downward when the support of the cable isremoved, so that the use of the fiat springs is not absolutelynecessary. However, I prefer to use the springs inv connection with thegravity action above referred to, since the rapidity of operation of thedevice, in case of the breakage of the cable, is increased. Also, inorder to increase the elliciency of the operation of the eccentrics, Iprefer to nurl their peripheries 59 so that the efficiency of theirfrictional contact with the rail 7 will be increased. However, thenurling of the peripheries of the eccentrics 19 not essential, since eX-perience has shown that the eccentrics with plain peripheries willquickly and effectually engage with the rails 7, which are preferablymade of wood, while the eccentrics are of metal.

As will be understood, when the eccentrics 19 engage with the rails 7 asabove described, a strain will be imposed on the eccentric shaftsoutwardly from the posts 2, tending to shear the shafts and to rupturethe bearing block 9 through the journal bearings which it forms for saideccentric shafts. To provide for this, the bearing block 9, in additionto being of heavy construction, is shaped as illustrated in thedrawings, so as to most effectually resist the strains as abovedescribed, while, being bolted to the post 2 in connection with thebraces and strap' 16, it is eifectually reinforced. by these parts.

By providing the slotted cranks to make up the connecting mechanism, anytwisting strain which comes on the eccentric shafts 18 will not betransmitted to the shafts 48 and the slotted cranks, so that theseshafts and slotted cranks may be of comparatively light construction.Likewise, slotted cranks 49 being provided for connection with the pinblock on the supporting head, any twisting strains which may be imposedon this supporting head will not be transmitted to the connectingmechanism. The guide plates for the supporting head constitute adesirable feature in that they maintain the head in a practicallyuniform position, the accomplishment of which object is furtherfacilitated by the pivotal connection of the yoke 2S to the head 23 bymeans of the pin 27 These features, together with the angularlydisposedv upper parts of the supporting head allowing` the sheaves to bemounted at an angle and relieve the twisting` strains on the cables ashereinbefore described, constitute an elevator mechanism of simpleconstruction, dispensing with considerable friction and consequent wearin operation, as well as providing an effective device for preventingthe fall of the car when the support of the cables is removed bybreakage of the cables on any of the supporting parts.

The parts and the combination and. arrangement of the parts as hereinillustrated and described, while constituting part of my invention andbeing calculated to provide for the most efficient operation, will beunderstood as subject to such modifications as may be found. expedientin the application of my invention under various conditions, so far assuch modifications do not depart from the scope and spirit of myinvention.

In view of this, and having fully described my invention, what I claimas new and desire to secure by Letters Patent is:

1. In elevator mechanism, the combination with an elevator carcomprising posts and a beam connecting the posts, of stationary guides,bearings on the posts, eccentric shafts journaled in the bearings,eccentrics mounted. on the eccentric shafts adjacent to the guides, aslidable supporting head for the elevator car, crank shafts extendingbetween the supporting head and the eccentric shafts, cranks on theeccentric shafts, slotted cranks on the crank shafts, means forconnecting the slotted cranks with the cranks on the eccentric shafts,and means for operatively connecting the crank shafts with themsupporting head, whereby the movement of the eccentrics on theeccentric shafts is controlled, substantially as and for the purposesspecified.

2. In elevator mechanism, the combination with an elevator carcomprising posts and a beam connecting the posts, of stationary guides,bearings on the posts, eccentric shafts journaled in the bearings,eccentrics mounted on the eccentric shafts adjacent to the guides, aslidable supporting head for the elevator car, crank shafts extendingbetween the supporting head and the eccentric shafts, cranks on theeccentric shafts, slotted cranks on the crank shafts adjacent to thecranks on the eccentric shafts, and other slotted cranks on the crankshafts adjacent to the slidable supporting head, means for connectinglthe cranks on the eccentric shafts with the adj acent slotted cranks onthe crank shafts, and means for o erative connection of the otherslotted cran (s on the crank shafts to the slidable supporting head,substantially as and for the purposes specified.

3. In elevator mechanism, the combination with an elevator carcomprising posts and a beam connecting the posts, of stationary guides,combination guide and bearing blocks mounted on the posts adapted toengage with the guides and to form bearings for eccentric shafts,eccentric shafts ournaled in the bearings thus formed, eccentricsrigidly mounted on the eccentric shafts adjacent to the guides, asupporting head embracing the beam and slidable with respect thereto,crank shafts extending longitudinally of the beam, cranks on theeccentric shafts, slotted cranks on the crank shafts, means forconnecting the slotted cranks with the cranks on the eccentric shafts,additional slotted cranks on the crank shafts, and means for connectingsaid additional slotted cranks with the supporting head whereby themovement of the eccentrics on the eccentric shafts is controlled, substantially as and for the purposes specified.

4. In elevator mechanism, the combination with an elevator carcomprising posts and a beam connecting the posts, of stationary guides,a supporting head, eccentric shafts, eccentrics mounted on the eccentricshafts, means for operatively connecting the eccentrics to thesupporting head, combination guide and bearing blocks mounted on theposts, having recesses within which the stationary guides may engage andforming bearings for the eccentric shafts, bolts passing at right anglesto the eccentric shafts and other bolts passing parallel to theeccentric shafts through the bearing blocks and posts to secure thebearing blocks to the posts, substantially as and for the purposesspecified.

5. In elevator mechanism, the combination with a car, comprising uprightposts, and a beam connecting the posts, of stationary guides adjacent tothe posts, a supporting head embracing the beam and slidable Withrespect thereto, eccentric shafts, eccentrics rigidly mounted on theeccentric shafts and adapted to engage with the stationary guides,combination guide and bearing blocks mounted on the posts, havingrecesses within which the guides are adapted to engage and formingbearings for the eccentric shafts, cranks mounted on the eccentricshafts, bearing blocks mounted on the beam, crank shafts j ournaled inthe bearing blocks and extending longitudinally of the beam between thesupporting head and the cranks rigidly mounted on the eccentric shafts,slotted cranks l rigidly mounted on the crank shafts adjacent to thecranks on the eccentric shafts, additional slotted cranks rigidlymounted on the crank shafts adjacent to the supporting head, pin blocksrigidly mounted on the supporting head, pins rigidly secured in the pinblocks transversely thereof and engaging with said additional slottedcranks on the crank shafts, and means for connecting the cranks on theeccentric shafts to the adjacent slotted cranks on the crank shafts,whereby the eccentrics may be held out of engagement with the guides orallowed to engage therewith, substantially as and for the purposesspecified.

l JACOB BAUM.

Witnesses:

JAMES Y. RAMsnY, CLARENCE Pnnnnw

